X-ray nano-holotomography reconstruction with simultaneous probe retrieval
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910662286901248 |
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| author | Nikitin, Viktor Carlsson, Marcus Gursoy, Doga Mokso, Rajmund Cloetens, Peter |
| author_facet | Nikitin, Viktor Carlsson, Marcus Gursoy, Doga Mokso, Rajmund Cloetens, Peter |
| contents | In conventional tomographic reconstruction, the pre-processing step includes flat-field correction, where each sample projection on the detector is divided by a reference image taken without the sample. When using coherent X-rays as probe, this approach overlooks the phase component of the illumination field (probe), leading to artifacts in phase-retrieved projection images, which are then propagated to the reconstructed 3D sample representation. The problem intensifies in nano-holotomography with focusing optics, that due to various imperfections create high-frequency components in the probe function. Here, we present a new iterative reconstruction scheme for holotomography, simultaneously retrieving the complex-valued probe function. Implemented on GPUs, this algorithm results in 3D reconstruction resolving twice thinner layers in a 3D ALD standard sample measured using nano-holotomography. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_20304 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | X-ray nano-holotomography reconstruction with simultaneous probe retrieval Nikitin, Viktor Carlsson, Marcus Gursoy, Doga Mokso, Rajmund Cloetens, Peter Image and Video Processing Optics In conventional tomographic reconstruction, the pre-processing step includes flat-field correction, where each sample projection on the detector is divided by a reference image taken without the sample. When using coherent X-rays as probe, this approach overlooks the phase component of the illumination field (probe), leading to artifacts in phase-retrieved projection images, which are then propagated to the reconstructed 3D sample representation. The problem intensifies in nano-holotomography with focusing optics, that due to various imperfections create high-frequency components in the probe function. Here, we present a new iterative reconstruction scheme for holotomography, simultaneously retrieving the complex-valued probe function. Implemented on GPUs, this algorithm results in 3D reconstruction resolving twice thinner layers in a 3D ALD standard sample measured using nano-holotomography. |
| title | X-ray nano-holotomography reconstruction with simultaneous probe retrieval |
| topic | Image and Video Processing Optics |
| url | https://arxiv.org/abs/2407.20304 |